Q24/7 claims company does not want to repair my car and i dont want to accept offer can they force me?

are saying damage to my car was in a previous accident and my car was a cat , but I c How mot done and I asked why not put it in my logbook was a cat ci brought the car owner in good faith This does not know it was a cat c for 4500 and 6000 spent on mods , but says people tryin to give me 795 cash only in solving lou have not accepted , but we are saying that u want sent the check back courtesy car even though I have not accepted what they are really trying to force me to make money even though it was not my fault yhat can do ?